Bank of Japan policymakers were split over whether the central bank would be able to attain its 2 percent inflation target in about two years as pledged in April, with some members saying it would be "difficult," minutes of their Oct. 31 meeting showed Tuesday.

The BOJ's economic outlook report released on the day said the central bank expected the country's inflation rate to reach 1.9 percent in fiscal 2015, but the views of three out of nine Policy Board members differed. The number in opposition was bigger than in the previous outlook report in April, when only two dissented.

While most members opined that the economy was likely to achieve around 2 percent inflation toward the latter half of the projection period between fiscal 2013 and fiscal 2015, "a few members said that it seemed difficult to achieve" the target within the time frame, the minutes said.